The chainsaw that Leatherface uses in the film weighed 35 pounds
When Eric gets his face wrapped in cellophane by Sheriff Hoyt that's actually real, Matt Bomer's head was actually being wrapped in Saran Wrap, R. Lee Ermey said he was very concerned for him. They left a small gap opening at the bottom of Matt's chin for him to breathe but that didn't help much, so when ever he was having trouble breathing he would indicate by knocking his knees together
Producers Andrew Form and Brad Fuller decided not to make a sequel to the 2003 movie. But the fans kept coming to them, asking how the family got that way and wanting to know several unanswered questions in the 2003 version (some of them include how Monty lost both of his legs, to how Sheriff Hoyt lost his front teeth, and how Leatherface got his nickname). And after a meeting with Michael Bay, they let Sheldon Turner write the script for a prequel and they were prepared to make it.
During filming, R. Lee Ermey was called away to his mother's death bed. For the remainder of the time, filming was done around his character.
The cow that gets hit by the jeep was made of fiberglass and filled with blood, fake entrails and fake bones then screwed together